I work in a hospital and I'm not gonna lie, I almost feel safer knowing the mess is in the bathroom. It's psych rooms and trauma rooms I'm afraid of. But afraid is a relative term. Messes don't actually scare me anymore. I've just seen too much.

Worst non-cleaning experience was when a biker dude burst in while I was cleaning and whipped his dick out. He gave me a big smile saying"I gotta piss like a racehorse!". I practically had to dodge his stream.

The messiest bathroom I've ever cleaned was one that was projectile vomited at/into. The person puked from ten feet away and covered the doorway and a door-shaped swath of bathroom in splatter. Now, this wasn't bad puke. I think they were on some sort of weird diet. Or maybe they hadn't eaten much recently. It was just impressive for it's size. I had to clean in the way you might clean a surgical room. Mopping walls and such.

The most unpleasant was one used for days by a psych patient. The weekday housekeeper hadn't been cleaning it daily and the patient hadn't been flushing. So there was about a day and a half of shit lasagna(shit, paper, shit, paper- you get the idea) in the toilet soaked in piss with all the walls covered in piss. The toilet was clogged, of course. It was a quick mess to clean, but horrifying for it's brief life.

But I know what you want OP. You want absolute shitgore. For that we will have to leave the bathroom. I always remember this as the "Poosplosion". I'm not sure exactly what went down, but there was liquid feces everywhere. Covered the bed, mattress, movement structures, frame, everything. Even some blowback on the underneath of the bed. The floor for probably five square feet. A food tray. And a bit of wall. It stunk with a very sharp sickly scent of rotten eggs. With hints of blood. Before I got there a couple nurses had covered the bed in handsoap. Which was stupid. It's an easy to wipe surface. This was more of a towels and disinfectant job. So all of the bed poo was now in a lathery matrix that was nigh on impossible to clean using my normal methods.

I took a doctors mask and sprayed it in bathroom deodorant(enzysan for those curious), this and my gloves would be my only line of defense. Probably not great for me. But my stomach was turning and this had to get cleaned somehow. Very little turns my stomach. I started by mopping a path around the bed so I could work. I got probably 25 towels and soaked up as much as I could. Filled an entire linen bag. Then came like 45 minutes of disinfecting and scrubbing. After I got all the poo out I had to straight up reclean the room. I was there for about two hours total.